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Abstract Three working face of 4 coal seam and four working face of the 8 coal seam in Xingzhe Mine were sampled and analyzed respectively in order to know their coal quality and calorific value. In the whole sampling process including 84 droups, average calorific value of each working face and calorific value of each coal seam were analyzed. Based on average calorific value of 4 coal seam and 8 coal seam, the calorific value data of entire mine was made sure.
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